Mariah Carey and Nick Cannon became parents to twins, a girl and boy, on Saturday afternoon, the AP reports. The couple, who also celebrate their four-year anniversary today, have not named the children yet. Cannon was reportedly “so nervous he went to the wrong department at the hospital, and was guided to the maternity ward by a nurse.†A rep claims the couple was listening to Carey’s “We Belong Together†after the children were born, which is probably more appropriate than — but still inferior to — “Fantasy.†[AP]